class Celsius:
    def __init__(self,value=26.0):
        self.value=float(value)

    def __get__(self, instance, owner):
        return self.value

    def __set__(self, instance, value):
        self.value = float(value)

class Fahrenheit:
    def __get__(self, instance, owner):
        return instance.cel*1.8+32

    def __set__(self, instance, value):
        instance.cel = (float(value)-32)/1.8

class Temperaure:
    cel = Celsius()
    fah = Fahrenheit()